Blind-stop



(No Model.) v

L. G. THORNE.

BLIND STOP.

No. 492,122. Patented Feb. 21, 1893.

WITNESS/58:. INVENTOH W W 224,

ATTORNEY.

Unrrnn STATE PATENT Ohm-cs. I

LAWRENCE O. THORNE, OF ROCK FALLS, ASSIGNOR OF ONE-HALF TO JOHN V.EMMITT, OF STERLING, ILLINOIS.

BLIND-STOP.

SPECIFICATION forming part of Letters Patent No. 492,122, dated February21, 1893. Application filed October 1'7, 1892. Serial No. 449,167. (Nomodel.)

- To all whom it may concern.-

Be it known that I, LAWRENCE O. THORNE, a citizen of the United States,residing at Rock Falls, in the county of Whiteside and State ofIllinois, have invented certain new and useful Improvements in Blind-Slat Locks; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same,referencebeing had to the accompanyingdrawings, and to the letters andfigures of reference marked thereon, which form a part of thisspecification.

My invention has reference to improvements in blind slat locks, andconsists of a peculiarly constructed duplex spring, seated on one of theslats of the blind, and having its free end projected under and heldwithin an elongated staple attached to the vertical stile at theadjacent side of the blind.

The purpose of my invention is to provide a cheap and expeditious methodof lockin g the blind-slats at any desired angle, to prevent theirrattling, and to regulate the admission of the light. I attain thispurpose by the construction shown in the accompanying drawings, in whichFigure 1 is a perspective of a portion of,

blind, embodying myinvention,with the blindslat closed. Fig. 2 is thesame, with the blind slats in a horizontal position.

As my invention pertains simply to the method of locking the slats ofthe blind, and the construction of the diiferentkinds of blinds aresubstantially the same, and myinvention is adapted for operation inconnection with any of such types, I do not deem it necessary to show ordescribe the entire blind, or any more thereof than will renderintelligible the location, construction, and operation of my invention.

A is the stile of the blind, of any of the usual forms, and on thevertical inner face of which there is suitably seated a staple B, havinga sufficient interval between its attached ends 11, for the desiredmovement of the end 2, of the spring, parallel with the stile A.

O is the ordinary slat, journaled in the usual way at each end in thevertical stiles A, and

thereby adapted to oscillate on said journa bearings. 7

E is the usual Vertical rod, extending the length of the blind aboutcentral of the slats O, and'pivotally connecting all of the latter.

D is a suitable double coiled spring, having its lower end 3 suitablyseated upon the face of one of the slats O.

In Fig. 1 is shown the slat C as closed, or standing in a nearlyvertical position. In that position, the first coil 4: of the springwire D, consisting of six coils of a suitable spring wire, is seatedperpendicularly to the adjacent surface of the slat O, and extends,inthe aforesaid closed position of the slat, horizontally into theapartment. The Wire D, after leaving the coil 4, is, with a sufficientintervening interval, turned into a second coil 5, perpendicular to thefirst; or, in other words, such second coil 5 has its axis substantiallyparallel to the slat C, from whence the wire D is extended outwardly insubstantially a straight line, to form the attaching end 2,whichprotrudes under the staple B. The lower part of the staple B may benotched if desired, but the action of the spring D being directlyagainst the inner surface of staple B, it will be found that the part 2will be held against said staple with sufficient rigidity to hold theblind slats against any casual movement, or the operation of the wind.This action of the part 2 iscaused by both coils 4 and 5, and thefurther advantage or purpose in the coil 4 is to build the spring outfromthe slat C, so as to enter the interval under the staple O insubstantially a horizontal position. The wire D extends a sufficientdistance beyond the staple B to afford a readymeans of grasping the sameby the hand. By pressing the end 2 of the wire D toward the stile A,from contact with the under side of the staple B, the slats O can bereadily moved in any desired position, and by merely releasing the end 2the action of the coiled springs will immediately lock the slats in thatposition.

The purpose of the double coil in the spring D is to get the outwardaction against the staple B, of the end 2, in whatever position the itsgreater transverse axis is in a horizontal plane, the axis of the coil 5will be horizontal, and the axis of the coil 4 vertical, in whichposition the coil 4; would operate to throw the end 2 against the stapleB. But in the position shown in Fig. 1, the secondary coil 5 isnecessary to give the pressure of the end 2 of spring D in a directionperpendicular to the plane of the stile A, and against the under side ofthe staple B. Therefore, the two coils, having their axes in differentplanes, are essential in order to procure the outward pressure aforesaidof the end 2, in every position of the slats.

The advantages of my invention are that it is simple, cheap, easy ofattachment, being seated on the slat with one screw, and that it can beoperated with one hand.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, is-- The combination of the stile A provided withstaple B, slat O journaled in said stile, vertical rod E and spring Dseated at one end on said slat, and provided intermediately with twocoils, in different planes, and with a free end 2 adapted to beprojected under and bear against said staple B; substantially as shown,and for the purpose described.

In testimony whereof I aflix my signature in presence of two witnesses.

LAWRENCE C. TI'IORNE.

lVitnesses:

JOHN F. BARRETT, VIRGIL S. FERGUSON.

